thermals: so much fun!

i started with thermals when my 1st plane (free flight) got into 1 and went up and away. from then i began to use a fuse for dethermalizing and was able to get back my planes most of the time. then came radio and got into sailplanes, with which i was able to hunt for thermals. climb to about 45 to 60 degrees and watch the plane for jumping up and turning until got it. when drifted too far brought it back and search for another. no more than 10 minutes. fun!
then recently got a vario and a new dimension, as i am able to 'see' the thermal-or whatever makes my plane stay there or climb. but then i faced another situation, as now i could stay longer, so got devices to warn me of low voltage. ended up having 1 that sends vibrations, and another that shows volts of each cell, and sends beeps when reaching the voltage that i decided to be the lowest safest. the smaller (vibrator) fits my planes with reduced space, and the other the larger 1s.
but once on a long flight i didn't feel the vibrations and lost a plane. am not sure if the device failed or its battery went down or i just didn't pay attention to it, but now am trying to take measures to avoid this to happen again, like bringing the plane down at a higher voltage warning, and above all, not staying up for so long.
and will keep enjoying the most enjoyable (to me) experience.
these are the alarms:
https://www.hobbyking.com/hobbyking/s...15Mhz_FM_.html
https://www.hobbyking.com/hobbyking/s..._mAh_V3_1.html

have fun.